Results 151 to 160 of about 1,742 (197)

Hygroscopic expansion of a compomer and a composite on artificial gap reduction [PDF]

Journal of Dentistry, 2002
This study compared the effect of water sorption on the extent of marginal gap reduction in a compomer (Dyract AP, Dentsply) and a composite (Spectrum, Dentsply) over a 12-week storage period.Artificial gaps were created in 40 borosilicate glass cylinders, each 5mm deep and with an internal diameter of 5.5mm.
S H Y Wei, D H Pashley, D H Pashley
exaly   +7 more sources

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Sequencing from Compomers: The Puzzle

Theory of Computing Systems, 2005
The board game FragmindTM poses the following problem: The player has to reconstruct an (unknown) string s over the alphabet $\Sigma$. To this end, the game reports the following information to the player, for every character $x \in \Sigma$: First, the string s is cleaved wherever the character x is found in s.
openaire   +1 more source

Compomers: between glass-ionomer cements and composites

Biomaterials, 1998
The term 'compomer' was crafted by the producers of the first commercial material of this kind: a polyacid-modified composite resin, sold as a filling material for some specific applications. This term should recall the composite resins and glass-ionomer cements, since some features of these two generic materials are found in the compomers.
Meyer JM, Cattani-Lorente MA, Dupuis V
openaire   +3 more sources

The effect of 30% hydrogen peroxide on the color of compomers

Journal of Biomedical Materials Research Part B: Applied Biomaterials, 2003
AbstractThe interaction between bleaching agents and recently introduced compomers has several issues that need to be explored, including morphology and mechanical properties. To investigate the effect of 30% hydrogen peroxide, a bleaching agent, on the color of compomers, three compomers (Compoglass F, Elan, and F2000) were polymerized, bleached up to
Y H, Kwon, T Y, Kwon, H I, Kim, K H, Kim
openaire   +2 more sources

Effect of enamel pretreatments on bond strength of compomer

Dental Materials, 2001
The objective of this study was to evaluate the effect of various enamel surface treatments on the bond strength of a compomer to enamel.Ground bovine enamel specimens were divided into four groups. A compomer (F2000, 3M) was bonded to the specimens using different enamel surface treatments.
Glasspoole, E.A., Erickson, R.L., Davidson, C.L.   +2 more
exaly   +6 more sources

In vitro cytotoxicity of a composite resin and compomer

International Endodontic Journal, 2002
AbstractAim This work was designed to investigate the potential cytotoxicity of two of the newer dental restorative materials, Spectrum® composite resin and Dyract® AP compomer.Methodology Cultured human endothelial cells (ECV‐304) were exposed to each of the restorative materials through a 70‐µm dentine barrier to simulate the in vivo clinical ...
C A, Quinlan, D M, Zisterer, K F, Tipton, M I, O'Sullivan   +3 more
openaire   +2 more sources

Compomers in restorative therapy of children: a literature review

International Journal of Paediatric Dentistry, 2006
Objective.  The restoration of carious primary teeth plays an underestimated role in paediatric dentistry. This is astonishing for many reasons, not least because many new materials have been introduced in recent years. New or modified techniques and materials, with better aesthetics and flexural properties, allow minimally invasive treatment.
Norbert, Krämer, Roland, Frankenberger
openaire   +2 more sources

Dentin shear bond strength of compomers and composites

Dental Materials, 2000
The aim of this study was to compare the shear bond strengths and fracture characteristics of two compomers bonded with a single step bonding agent with two modern composites, a microfil and hybrid, bonded with a fourth generation bonding agent.Freshly extracted human third molars were sectioned parallel to the occlusal surface to expose midcoronal ...
B T, Schneider, M A, Baumann, L G, Watanabe, G W, Marshall   +3 more
openaire   +2 more sources

Discoloration of a compomer by stains.

The Journal of the Greater Houston Dental Society, 1998
This study evaluated the color stability of a polyacid-modified composite (compomer) upon exposure to stains. Five disks were prepared for immersion in each of five stains: coffee, chlorhexidine, cola, red wine, and water as a control. Color measurements were made on a reflection spectrophotometer at baseline, after 24-hour incubation, and after 24, 48,
R M, Fay, C S, Walker, J M, Powers
openaire   +1 more source

RESIN-BASED COMPOSITES AND COMPOMERS IN PRIMARY MOLARS

Dental Clinics of North America, 2000
Resin-based composite resins and polyacid-modified resin-based composites (compomers) have become popular for the restoration of primary anterior and posterior teeth. In some European countries, resin-based composites or glass-ionomers are the materials of choice for primary teeth because of the controversy over dental amalgam and its alleged adverse ...
openaire   +2 more sources